Physics 151 Week 8 Day 2 Topics  Questions  Models  General Force Model  Newton’s 0th, 1st, and 3rd Laws of Motion  Newton’s 2nd Law  Force and Motion.

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Presentation transcript:

Physics 151 Week 8 Day 2 Topics  Questions  Models  General Force Model  Newton’s 0th, 1st, and 3rd Laws of Motion  Newton’s 2nd Law  Force and Motion Graphs Applying Newton’s Laws of motion

Nature of a Model What was the model under debate for Columbus’ Voyage? A.The world is flat vs. round B.The size of the Earth C.Something Else Is a model of reality the same as reality?

General Force Model Newton 0th Law Objects are dumb - They have no memory of the past and cannot predict the future. Objects only know what is acting directly on them right now Newton's 1st Law An object that is at rest will remain at rest and an object that is moving will continue to move in a straight line with constant speed, if and only if the sum of the forces acting on that object is zero. Newton's 3rd Law Recall that a force is an interaction between two objects. If object A exerts a force on object B then object B exerts a force on object that is in the opposite direction, equal in magnitude, and of the same type. Visualizations: Force Diagrams System Schema

Net Force and Motion Graphs

Net Force vs. Acceleration Graphs

Net Force vs. Mass Graphs